Sodium citrate assisted facile synthesis of AuPd alloy networks for ethanol electrooxidation with high activity and durability

JOURNAL OF POWER SOURCES

卷:329

Article

Zhai, Yanling¹  Zhu, Zhijun¹  Lu, Xiaolin¹  Zhou, H. Susan¹ 

[1] Worcester Polytech Inst, Dept Chem Engn, 100 Inst Rd, Worcester, MA 01609 USA

关键词: Sodium citrate;    Gold-palladium alloy nanowire;    Ethanol oxidation reaction;    High activity;    Improved durability;   

DOI  :  10.1016/j.jpowsour.2016.08.081

来源: Elsevier

【 摘 要 】

The direct ethanol fuel cell is an emerging energy conversion device for which palladium is considered as the one of the most effective components for anode catalyst, however, its widespread application has been still limited by the activity and durability of the anode catalyst. In this work, AuPd alloy networks (NWs) are synthesized using H2PdCl4 and HAuCl4 as precursors reduced by NaBH4 in the presence of sodium citrate (SC). The results reveal that SC plays significant role in network structure, resulting in the enhanced electrocatalytic activity of the catalyst. This self-supported AuPd NWs catalyst exhibits much higher electrochemical catalytic activity than commercial Pd/C catalyst toward ethanol electrooxidation in alkaline solution. Significantly, AuPd NWs catalyst shows extremely high durability at the beginning of the chronoamperometry test, and as high as 49% of the mass current density (1.41 A/mg(Pd)) remains after 4000 s current-time test at -0.3 V (vs. Ag/AgCl) in N-2-saturated KOH-ethanol solution. This strategy provides a facile method for the preparation of alloy networks with high electrochemical activity, and can be potentially expanded to a variety of electrochemical applications. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free